Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fa24c3e24741ddd…

MALICIOUS

PDF

44.7 KB
MD5: 829ba763bfcd78b11b8f93959430dd61 SHA-1: 7f959c39a3dbb24f1032a5380d07d0bdd61994e3 SHA-256: 1fa24c3e24741ddd9100d6a950fd64a63cbf790102ed85a9282541e875e48ceb
104 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.001 Malicious Link T1204.002 Malicious File

The PDF file contains embedded JavaScript and triggers a critical heuristic for the CVE-2010-2883 Adobe Reader CoolType SING font exploit. The embedded JavaScript is likely responsible for downloading and executing a secondary payload, as indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The presence of XFA form elements and ASCIIHexDecode filters further supports the exploit vector. While specific IOCs beyond benign URLs are absent, the exploit itself is the primary indicator of malicious intent.

Heuristics 6

  • Adobe Reader CoolType SING font exploit — CVE-2010-2883 critical CVE likely CVE_2010_2883
    PDF embeds a TrueType/OpenType font with an actual SING table and pairs it with JavaScript heap-spray shellcode. This matches the public Adobe Reader CoolType SING exploit shape for CVE-2010-2883.
  • ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX
    Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xci/2.6/
    • http://www.xfa.org/schema/xfa-template/2.6/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0012_000.js
0fed668702b5e1aeaecda7f1bc500023dde631edfac5663fe8c045c4500b7041		 pdf-javascript-stream PDF /JS object 12 at offset 0xA0BA 3688 bytes
font_00_sfnt_off0000033c.bin
683fcffe9abaad29001e134bdd9ad7d1628d5cbbf628c451b6c621f202a7dae4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x33C 65932 bytes

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